"Do not accept a ransom for the life of a murderer, who deserves to die. A murderer is to be put to death." (NIV)
Moreover, you shall take no ransom for the life of a murderer guilty of death; but he shall surely be put to death. (AMP)
Moreover ye shall take no satisfaction for the life of a murderer, which is guilty of death: but he shall be surely put to death. (KJV)